/Engine/Source/Runtime/UMG/Public/Blueprint/UserWidget.h
Called after a key (keyboard, controller, ...) is released when this widget has focus
Returns whether the event was handled, along with other possible actions
[FEventReply](API\Runtime\UMG\Components\FEventReply) OnKeyUp ( [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) MyGeometry, [FKeyEvent](API\Runtime\SlateCore\Input\FKeyEvent) InKeyEvent )